@bg-color:#b7d4a8;
*{
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
body{
  font: bold 20px Courier;
}
#main{
  width: 360px;
  height: 420px;
  background-color: @bg-color;
  margin: 100px auto;
  border:10px solid black;
  border-radius: 30px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-around;
}
#stage{
  width: 304px;
  height: 304px;
  border: 2px solid black;
  position: relative;

  #snake{
    &>div{
      width: 10px;
      height: 10px;
      background-color: #000;
      border: 1px solid @bg-color;
      // 开启绝对定位
      position: absolute;
    }
  }
  #food{
    &>div{
      width: 4px;
      height: 4px;
      background-color: #000;
      transform: rotate(45deg);
    }
    display: flex;
    flex-flow: wrap row;
    width: 10px;
    height: 10px;
    justify-content: space-between;
    align-content: space-between;
 
    position: absolute;
    left: 40px;
    top: 100px;
  }
}
#score-panel{
  width: 300px;
  display: flex;
  justify-content: space-around;
}